Combination compasses and dividers.



T. CHABRE. COMBINATION COMPASSES AND DIVIDERS.

APPLICATION FILED JUNE 9' H3.

Patented May 25, 1915.

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T. CHABRE.

COMBINATION COMPASSES AND DIVIDERS. APPLICATION man JUNE 9,1913.

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THEODORE GHAIBRE, OF ALAMEDA, CALIFORNIA.

COMBINATION COMPASSES AND DIVIDERS.

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Specification of Letters Patent.

Patented May 25, 1915.

Application filed June 9, 1913. Serial No. 772,576.

To all whom it may concern:

Be it known that I, THEODORE CHABRE, a subject of France, residing at No. 1615 Grand street, in the city of Alameda, county of Alameda, State of California, have invented new and useful Combination Compasses and Dividers for the Purpose of :1 Linear and Angular Measurement, of which the following is a specification.

This invention relates to an instrument for linear and angular measurements.

The object of the invention is to provide a simple, compact, easily adjusted instrument which is so constructed that it will combine in one the following instruments :compass, divider, outside or inside caliper, triangle, inside or outside bevel square, rule, protractor and leveler.

Further objects will appear hereinafter.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which,-

Figure 1 is a perspective view of the instrument. Fig. 2 is a perspective view partly broken away. Fig. 3 is an enlarged detail view showing the means for connecting the leg with the main beam. Fig. 4 is a perspective of the spring clamp. Fig. 5 is a perspective of the protractor locking clamp. Fig. 6 is a cross section on the line 50-00 of Fig. 3. Fig. 7 is a plan view of a reversible inside or outside caliper attachment. Fig. 8 is a plan of a divider attachment.

Referring to the drawings: A and A indicate a pair of compass beams, pivotally secured together as at 2. Formed integral with the beam A, or suitably secured to same, is a protractor 3. The beam A is slotted as at A for the purpose of guiding it with relation to the protractor and is also provided with a clamp member 4:, operated by a nut 5, which clamp member is so positioned as to engage the edge of the protractor and lock same with relation to the beam A. The outer ends of the main beams A and A are slightly enlarged and slotted as at A to form bearings for a pair of secondary beam members 7; the secondary beam members are each provided with a pair of extension legs 8 and 9, the extension 8 being pivotally secured, as at 10, on clamp screw 11 extending through the outer slotted bearing member 6 formed on each of the beams A and A.

Pivotally attached by clamp screws 12 to the extension legs 9, are leg members 13, and insertible into the outer ends of same in sockets 13 formed therein are divider points 14 or caliper points 15. The inner ends of these points are threaded, as indicated at 16, and are also provided with grooved shanks 17 with which screws 18 are engageable to securely lock same in the legs 13.

Suitably secured in the leg members 13 are springs 18, which are so positioned as to become engageable with the outer ends 19 of the leg extensions 9, and pivotally secured to the leg extensions 9, as at 20, are screws 21 which extend through slots 22 formed in the legs 13. The upper ends of the screws 21 are provided with nuts 23, which are pro vided to counteract the springs 18 and clamp the legs 13 to the extensions 9. Suitably secured to' the bearing portions 8 of the extensions 8 are upwardly extending stud members 24, and secured 011 each secondary beam 7 is a spring clamp 25 through which a stud bolt 24 extends. Nuts 26, threaded on the studs 24, are provided for the purpose of forcing the spring clamps 25 into frictional contact with the bearing members 6 formed on the main beams, to lock same with relation to the secondary members 7.

The upper surfaces of the beams A-A and legs 13 may have engraved thereon a graduated scale, as indicated at 27; the protractor is graduated to degrees, as at 28, on its upper surface and to a measuring scale, as at 29, on its lower surface. The bearing members 6 on the main beams A and A are graduated to degrees, as at 30, for the purpose of setting the legs 13 at any desired angle with relation to the main beams A and A. The adjusting nut 23 is provided with an indicating mark 31, which is registrable with a micrometer scale 32, the use of which will be later described.

The operation of the instrument, as now assembled, will be as follows: Supposing it is desired to measure the distance between two points which cannot be reached when the legs 13 are placed in line with the main beams A and A. This measuring is accomplished by swinging the legs 13 about their pivot screws 12 and locking same in position through the medium of the screws 26 and clamp members 25, as indicated in Fig. 2. The legs, together with the main beams A and A may then swing about the pivot members 11 and the distance secured by the outerpoints of the legsinay'be'read' on the scale 29. If it is desired to retain this measurement, it becomes possible to lock the legs and beams A and A by tightening the screw which regulatestl'ie clamp member 4:. Any fine adjustmentmay further be secured by turning the nut 23, as slackening up the nut 23 will permit the spring 18 to force the leg'1'3 in an outward direction with relation to the extension 9, and any measurement thus secured may be directly read upon the micrometer scale 32 and added to the distance previously secured on the scale 29. Any outside angular measurements may similarly be secured by placing the beams with connected legs 13 on the surfaces to be measured and the angle secured -may be directly read on the protractor scale 28.

Angular measurements may also be secured by placing the instrument in the position shown in Fig. 1, and the anglesthus'seem-ed may be read upon the scales 30.

The legs 13 may be moved into the position' indicated in Fig. 2, which position is assumed when using the device as dividers or calipers, and may be further locked against movement with relation to the main beams A and A by screws 33. These screws are provided with flat surfaces 34 on one side which permit the leg extensions 8 to pass; however, by turning the screws from the position indicated in Fig. 2, it can be easily seen that the legs are completely locked against movement. Either the beam members A and A or legs 13 may be countersunk to receive a leveling device 35. The device will thus also be useful as a leveling instrument.

All the lower surfaces of the connected beams, legs and protractor attachment are perfectly straight edged, permitting the instrument to be placed upon any surface for measuring distances upon the scale 27. All extensions and clamp screws are placed on the front faces of the diflerent parts and will thus prevent any interference or irregularity of adjustment or measurement.

The instrument constructed as here shown is simple and compact in'construction and practically eliminates the use of the several separate instruments previously mentioned. The various locking clamp'sand set screws provided permit the instrument to be quickly adjusted and set for difierent measurements.

The materials and finish of the several parts of the device may be such as experience and judgment of the manufacturer may dictate. V

I wish it understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims, and that I do not wish to limit myself to the specific design and construction here shown.

Having thus described my inventionwhat I claim and desire to secure by L e tte rs Patent is:

1. A combination compass and divider comprising a pair of pivotally connected beams, a protractor secured to one of said beams, a clamping member on the other beam engageable with the edge of the pro tractor, a secondary beam pivotally mounted in the outer end of each mainbeam, means for ad usting the angular position of saidsecondary beams with relation to the main beams, and a leg member pivotally secured to each secondary beam.

2. A combination compass and divider comprising a pair of pivotally connected beams, a protractor secured to one of said beams, a clamping member on the other beam engageable with the edge of the protractor, a secondary beam pivotally mounted, in the outer end of each main beam, means"- for adjusting the angular position of said secondary beams with relation to the main beams, a leg member pivotally secured to.

each secondary beam, and means for adjusting the angular position of said legs with relation to the secondary beams.

3. A combination compass and divider comprising a pair of pivotally connected beams, a protractor secured to one of said beams, a clamping member on the other.

beam engageable with theedge of the protractor, a secondary beam pivotally mounted in the outer end of each main beam,

means for adjusting the angular position of sald secondarybeams with relation to' the mam beams, a leg member pivotally secured to each secondary beam, springs interposed between theleg members and the secondary beams, and adjusting screws operable in coned in the outer end of each main beam, a-

spring clamp member mounted on each secondary beam, a stud screw mounted on the outer end of each main beam over which the spring clamps extend,nuts on said stud screws operable to move the springclamps into locking engagement with the main beams, and a leg member pivotally secured to each secondary beam.

5. A combination compass and divider comprising a pair of pivotally connected beams, a protractor secured to one of said beams, a clamping member on the other, i

beam engageable with the edge of the protractor, a secondary beam pivotally mount ed in the outer end of each main beam,

a spring clamp member mounted on each secondary beam, a stud screw mounted on the outer end of each main beam overwhic'h the spring clamps extend, nuts on said stud In testimony whereof, I have set my hand screws operable to move the spring clamps this 36. day of June A. D. 1913.

into locking engagement with the main beams, a leg member pivotally secured to THEODORE OHABRE' each secondary beam, and means for adjust- Witnesses:

ing and securing each leg in an angular po- GUSTAVE MAGNAN,

sition with relation to the secondary beams. WM. DUFOUR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents,

Washington, D. G. 

